Tommorrow I will receive my new Zotac 430 for My old Pci only PC. Currently running Seti@Home with Luniatics apps. This PC has intregated Intel extreme graphics 2 video controller.
Is ther anything special I need to be aware of after installing this card which is cuda capable? Do I just diable the onboard graphics, or do I need to make Bios changes. Is there anything I need to do to make this card run the cuda cores?

The answers to your PC hardware questions are "it depends on your particular motherboard", most do it automagically, but some need some human guidance.

You will have to install the current drivers - use the Nvidia ones, not the ones that Windows will go off and hunt for.
Visit the Lunatics website and download the latest installer, it will take you through the installation of the current apps - you might want to consider not running the ApsroPulse app on your '430 as it would be a bit hard on it (and I'm not too sure about it running OpenCL).

Finally:
Sit back and enjoy
____________
Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?